全自动洗衣机控制系统的设计
附 录A：系统总图
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全自动洗衣机控制系统的设计
附 录B：外文文献及译文
英文文献： AT89S51
The monolithic integrated circuit widely applies to the trade: Such as digital electronic clock ,modem, motor control system, air conditioning control system, motorcar engine and other some domains. These monolithic integratedcircuits high speed processing speeds and the enhancement auxiliaryequipment set causes them to suit to this kind of high speed eventapplication situation. However, these key application domains alsorequest these monolithic integrated circuits to be highly reliable.The vigorous and healthy test environment and uses in to confirm theseregardless of or the system rank monolithic integrated circuitappropriate tool environment has guaranteed the redundant reliabilityand the low market risk in the Yuan part level. The Intel platformengineering department object-oriented developed one kind to use in toconfirm its AT89S51 automobile monolithic integrated circuitmultilinear form test environment. This kind of environment goal notonly is the AT89S51 automobile monolithic integrated circuit providesone kind of vigorous and healthy test environment, moreover willdevelop one kind to be able to be easy to expand and the repetitionuses for to confirm other several kind of future the monolithicintegrated circuit. Development this kind of environment has connectedAT89S51.
The monolithic connect with a microcomputer tightly.A microcomputer is a computer with a microprocessor as its central processing unit. Another general characteristic of these computers is that they occupy physically small amounts of space when compared to mainframe and minicomputers. Many microcomputers (when equipped with a keyboard and screen for input and output) are also personal computers (in the generic sense).[2][3]
The abbreviation \was common during the 1970s and 1980s,[4]but has now fallen out of common usage.
Most notably, the microcomputer replaced the many separate components that made up the minicomputer's CPU with a single integrated microprocessor chip.
The earliest models often sold as kits to be assembled by the user, and came with as little as 256 bytes of RAM, and no input/output devices other than indicator lights and switches.
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全自动洗衣机控制系统的设计
However, as microprocessors and semiconductor memory became less expensive from the early-to-mid-1970s onwards, microcomputers in turn grew faster and cheaper. This resulted in an explosion in their popularity during the late 1970s and early 1980s.
A large number of computer manufacturers packaged microcomputers for use in small business applications. By 1979, many companies such as Cromemco, Northstar,South West Technical Products, Ohio Scientific, Altos, Morrow Designs and others produced systems designed either for a resourceful end user or consulting firm to deliver business systems such as accounting, database management, and word processing to small businesses. This allowed businesses unable to afford leasing of a minicomputer or time-sharing service the opportunity to automate business functions,
without (usually) hiring a full-time staff to operate the computers. A representative system of this era would have used an S100 bus, an 8-bit processor such as a Z80, and either CP/M or MP/M operating system.
The increasing availability and power of desktop computers for personal use attracted the attention of more software developers. As time went on and the industry matured, the market for personal (micro)computers standardized around IBM PC compatibles running MS-DOS (and later Windows).
Modern desktop computers, video game consoles, laptops, tablet PCs, and many types of handheld devices, including mobile phones and pocket calculators, as well as industrial embedded systems, may all be considered examples of microcomputers according to the definition given above.
Although they contained no microprocessors but were built around TTL logic, Hewlett Packard Calculators as far back as 1968 had various levels of programmability such that they could be called microcomputers. The HP 9100B (1968) had rudimentary conditional (IF) statements, statement line numbers, Jump statements (Go to), registers that could be used as variables, and primitive subroutines. The programming language resembled Assembly language in many ways. Later models incrementally added more features, including the BASIC programming language (HP 9830A in 1971). Some models had tape storage and
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全自动洗衣机控制系统的设计
small printers. However, displays were limited to a single line at a time.[1] The HP 9100A was referred to as a personal computer in an advertisement in a 1968 Science magazine[5] but that advertisement was quickly dropped.[6] It is suspected[who?] that HP was reluctant to call them \because it would complicate government procurement and export procedures.[citation needed]
????The Datapoint 2200, made by CTC in 1970, is perhaps the best candidate for the title of \microcomputer\While it contains no microprocessor, it used the 4004 programming instruction set and its custom TTL logic was the basis for the Intel 8008, and for practical purposes the system behaves approximately as if it contains an 8008. This is because Intel was the contractor in charge of developing the Datapoint's CPU but ultimately CTC rejected the 8008 design because it needed 20 support chips.[7]
Another early system, the Kenbak-1, was released in 1971. Like the Datapoint 2200, it used discrete TTL logic instead of a microprocessor, but functioned like a microcomputer in most ways. It was marketed as an educational and hobbyist tool, but was not a commercial success; production ceased shortly after introduction.[2] Another system of note is the Micral-N, introduced in 1973 by a French company and powered by the 8008; it was the first microcomputer sold all assembled and not as a construction kit.
Virtually all early microcomputers were essentially boxes with lights and switches; one had to read and understand binary numbers and machine language to program and use them (the Datapoint 2200 was a striking exception, bearing a modern design based around a monitor, keyboard, and tape and disk drives). Of the early \of switches\microcomputers, the MITS Altair 8800 (1975) was arguably the most famous. Most of these simple, early microcomputers were sold as electronic kits--bags full of loose components which the buyer had to solder together before the system could be used.
The period from about 1971 to 1976 is sometimes called the first generation of microcomputers. These machines were for engineering development and hobbyist personal use. In 1975, the Processor Technology SOL-20 was designed, which consisted of a single board which included all the parts of the computer system. The SOL-20 had built-in EPROM
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全自动洗衣机控制系统的设计
software which elimated the need for rows of switches and lights. The MITS Altair just mentioned played an instrumental role in sparking significant hobbyist interest, which itself eventually led to the founding and success of many well-known personal computer hardware and software companies, such as Microsoft and Apple Computer. Although the Altair itself was only a mild commercial success, it helped spark a huge industry.
1977 saw the introduction of the second generation, known as home computers. These were considerably easier to use than their predecessors, whose operation often demanded thorough familiarity with practical electronics. The ability to connect to a monitor (screen) or TV set allowed for visual manipulation of text and numbers. The BASIC programming language, which was easier to learn and use than raw machine language, became a standard feature. These features were already common in minicomputers, which many hobbyists and early manufactures were familiar with.
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